PPT-EARTHQUAKE Earthquake refers to a sudden violent shaking and vibration of the earth surface

Tectonic plates are huge rock pieces within the earths crust The plates are usually marked by fractures or fault lines formed when the plates tear apart or slide or collide past each other This results in a change of the earths interior masses which send out powerful shock waves with enough force to alter the surface of the earth The shock waves can thrust up cliffs and open huge cracks on the ground leading to an earthquake event. By. : 10 grade. What is an earthquake ?. Simply, earthquakes are the rumblings, shaking or rolling of the earth's surface. It is usually what happens when two blocks of the earth suddenly slip past one another, or break apart from each other as a result of tension caused by prolonged energy build up. . :. What You Need To Know. Tsunami Outreach Oregon. Oregon Department of . Geology . and Mineral Industries . Cascadia Earthquake: Key Messages. A local Cascadia earthquake will probably happen in most people’s lifetime or their children’s lifetime.. Active Fault. Earthquakes Create Seismic Waves. (also hypocenter). 3 Types of Seismic Waves. P wave: Primary. S wave: Secondary. Surface waves. Fastest. Slowest. Depiction of Seismic Waves. Types of Earthquake Waves. Hazards are produced from the response of energy released. Amount and duration are related to the amount of energy released. Which hazards do you know?. Earthquake Hazards. Tsunami: displacement of a large volume of water. Mount St. Helens. First recorded Earthquake? 1170 BC; 580 BC. Canadian Earthquakes: 1663, 1941, 8.1 on the Richter Scale, Near Queen Charlotte Islands, BC. Homework?. Devastating forces of nature.. In a matter of moments, a peaceful countryside can be transformed into a violent, twisted landscape.. earthquake. The point on Earth's surface directly above the focus of an earthquake.. epicenter. erosion. The process of wearing away and moving sediment by wind, moving water, or ice.. fault. A break in Earth's crust.. They Shape Our Landscape. As plates move, we may feel these movements as earthquakes. If there were no plate motions, our planet would not look like home. There would be no mountains, no valleys, no plateaus . Earthquake Risk. Earthquakes are likely wherever plate movement stores energy in the rock along faults.. Geologists can determine earthquake risk by locating where faults are active and where past earthquakes have occurred.. earthquake. (also known as a . quake. , . tremor. or . temblor. ) is the result of a sudden release of energy in the . Earth's. . crust. that creates . seismic waves. . . The . seismicity. , . seismism. Created By:-. Ghanva Krishna. Department:-. computer. Year:-. 3. rd. year(5. th. . sem. ). Gides. :. Ankita. . Parmar. Sapan. . parekh. SCET(. Surat. ). Introduction. Earthquakes. constitute one of the worst natural hazards which often turn into disaster causing widespread destruction and loss to human life.. An earthquake is a motion of the ground surface.. According to A.N. . Strahler. and A.H. . Strahler. ,(1976), ‘An earthquake is a vibration or oscillation of the surface of the earth caused by a transient disturbance of the elastic or gravitational equilibrium of the rocks at or beneath the earth the surface’.. . CEETEP. Sue Graves ~ August 2015. Local Cascadia Earthquake. 10,000-Year History of . Cascadia. 41 ruptures = average of 243 years. Damage to Homes. Damage to Schools. Structural Damage. Non-structural Damage. Pick up materials for the model. Assemble your model. Explore the behavior of the model and consider the following… “How this might this model represent the earthquake process?”. Earthquake Machine. travels as seismic waves in all directions through the. Earth’s layers, reflecting and refracting at each. interface. These waves are of two types - . body waves. and . surface waves; the latter are restricted to near the.